Cuban explained to Business Insider why getting a Shark like him can be so valuable to a company, and what the process following a successful pitch on the show looks like.

First of all, the handshake deal that happens on the show isn't anything binding. Filming for each season is split over the start of the summer and the start of the fall. After each round, the Sharks and their teams do due diligence on each of the companies to ensure that everything within the company is how it was represented in the pitch room.

There are times when the numbers check out, but the entrepreneurs decide they no longer want to make a deal, such as when the founders of evREwares decided they weren't actually willing to sell 100% of their struggling company to Cuban for $200,000 as they agreed to in season six.

Ultimately, said Cuban's fellow Shark Daymond John, about 80% of season seven's deals made on camera closed, which is up from about 60% to 70% of past seasons.

Each of the six "Shark Tank" investors have different management styles, but the main reason they typically ask for high-equity deals is that they are more hands-on than a typical venture-capital firm or angel investor.

Cuban hugs Simple Sugars founder Lani Lazzari after agreeing to a deal, which would become one of his most profitable.

Cuban said he and the Dallas-based Mark Cuban Cos. team "often take over their accounting, website, packaging design, and more."

Mark Cuban Cos. also optimizes a company's online presence through free software deals with business partners. Cuban's "Shark Tank" companies host their sites on Rackspace's servers and use customer-relationship management software from Nimble to store communications and monitor site analytics.

Cuban boosts his new companies' sales by assigning them seasoned marketers from his team and arranging distribution deals with partners like Amazon Exclusives and Brookstone.

"We realize that by taking the back office off their hands, they can focus on core competencies," Cuban said.

At last week's Wall Street Journal WSJD Live conference, Cuban said, "Of the 71 startups that I've invested in through 'Shark Tank,' two have gone out of business, three are so stupid they don't know they're out of business, and then probably 50, give or take, are in growth."